{"id":"F2006B06856","name":"AD/SD3-60/13 - Fuel System - Fuel Pipe Shrouds","slug":"ad-sd3-60-13-fuel-system-fuel-pipe-shrouds","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":114733,"registerId":"commonwealth-F2006B06856-current","compilationNumber":null,"startDate":"2026-04-03","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/SD3-60/13 - Fuel System - Fuel Pipe Shrouds","content":"COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 \\- 105 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n![](image.001.png)  \nShort SD3-60 Series Aeroplanes\n\nAD/SD3-60/13 Fuel System \\- Fuel Pipe Shrouds 9/85\n\nApplicability: All model SD3-60 with S/Nos SH3601 to SH3661 and SH3663 to SH 3665\\. Requirement: Action in accordance with Shorts SB SD360-28-12.\n\nCompliance: 1\\. Carry out \"Inspection of the collector tank housings for evidence of fuel leakage\" called for in the Shorts Maintenance Programme (Zonal Inspection 5-27-01, Page 6, Item 17) at every second 'A' check (120 hours time in service) after 31 October 1985 until modified.\n\n    2. Modify before 31 July 1986.\n\n    3. On completion of the modification, the inspection intervals referred to in item one\n    (1) of the compliance may return to the normal Maintenance Programme intervals.\n\nBackground: The manufacturer advises that operational experience has found that certain of the existing fumeproof shronds can deteriorate and become porous. New shrouds manufactured to an improved specification have therefore been introduced.","sortOrder":0}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"This is a discrete, time-bound safety directive issued in 1985 for a specific maintenance issue. It has not expanded beyond its original purpose of addressing deteriorating fuel pipe shrouds on Short SD3-60 aircraft."},"complexity_factors":["Single, specific aircraft type and narrow serial number range (SH3601-SH3661, SH3663-SH3665)","Only 3 compliance requirements with clear deadlines","References external technical document (Shorts SB SD360-28-12) but does not reproduce it","No defined terms section — uses plain technical language","Simple conditional logic: inspection required until modification, then normal intervals resume","Short document — approximately 150 words of substantive content"],"plain_english_summary":"This is an **Airworthiness Directive** — a mandatory safety order issued by Australia's Civil Aviation Safety Authority (CASA) for specific aircraft.\n\n**What it does:**\nOrders owners and operators of certain **Short SD3-60 series aeroplanes** (a type of regional aircraft) to inspect and modify their fuel systems. Specifically, it targets the **fuel pipe shrouds** — protective coverings around fuel pipes that prevent dangerous fuel fumes from escaping into areas where they could ignite.\n\n**Who it affects:**\n- Owners and operators of SD3-60 aircraft with serial numbers SH3601 to SH3661 and SH3663 to SH3665\n- Maintenance crews responsible for these aircraft\n\n**What must be done:**\n1. **Inspect** the collector tank housings for fuel leaks every 240 hours of flight time (every second 'A' check) starting from 31 October 1985, until the modification is done\n2. **Modify** the aircraft with improved fuel pipe shrouds before 31 July 1986\n3. **After modification**, return to normal inspection intervals\n\n**Why it matters:**\nThe manufacturer discovered that the original shrouds could deteriorate and become porous (full of tiny holes), allowing fuel fumes to escape. This creates a fire and explosion risk. The directive mandates a temporary inspection regime and a permanent fix to keep these aircraft safe.\n\n**Key point:** This is not optional — compliance is legally required under the Civil Aviation Regulations 1998."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The directive targets a specific defect (deteriorating, porous fuel-pipe shrouds) on a defined set of SD3-60 airframes and prescribes interim inspections plus a required modification. It does not expand to other models or systems beyond correcting the identified shroud issue."},"complexity_factors":["Narrow applicability: limited to specific SD3-60 serial numbers (SH3601–SH3661, SH3663–SH3665).","Prescriptive timetable: inspection frequency specified (every second 'A' check / 120 hours) and an absolute modification deadline (by 31 July 1986).","Dependence on external document: compliance requires following Shorts SB SD360-28-12 (manufacturer's service bulletin).","Interaction with routine maintenance: temporary deviation from normal maintenance intervals until modification is completed.","Operational/compliance burden: additional inspections and an engineering modification impose manpower, downtime and parts costs on operators."],"plain_english_summary":"**What it does:** Requires operators of Short SD3-60 aeroplanes (S/N SH3601–SH3661 and SH3663–SH3665) to inspect collector tank housings for fuel leakage every second 'A' check (120 flight hours) until an improved fuel-pipe shroud modification is fitted, and to complete that modification by 31 July 1986. After the modification the inspection intervals revert to the normal maintenance programme.\n\nWho it affects and why it matters: Owners, operators and maintenance organisations of the listed SD3-60s must absorb extra inspections and a mandated engineering modification to address porous fuel-pipe shrouds reported by the manufacturer."}},"importantCases":[],"_links":{"self":"/api/acts/ad-sd3-60-13-fuel-system-fuel-pipe-shrouds","history":"/api/acts/ad-sd3-60-13-fuel-system-fuel-pipe-shrouds/history","analysis":"/api/acts/ad-sd3-60-13-fuel-system-fuel-pipe-shrouds/analysis","conflicts":"/api/acts/ad-sd3-60-13-fuel-system-fuel-pipe-shrouds/conflicts","importantCases":"/api/acts/ad-sd3-60-13-fuel-system-fuel-pipe-shrouds/important-cases","documents":"/api/acts/ad-sd3-60-13-fuel-system-fuel-pipe-shrouds/documents"}}